The Bulk air flow sensor on a 1996 Nissan Sentra is a flaming wire type. The sensor outputs a linear vocable to the personal computer that helps the pc fix upon engine load for ignition and fuel calculations. As air increases complete the intake, the expression voltage increases. Whether the Bulk air flow sensor malfunctions, the machine may push into limp territory income. Provided this happens, the personal computer limits the engine to less than 3,000 rpm by turning the injectors on and off. The Bulk air flow is bolted to the air filter housing.
Instructions
DC Voltage Test
1. Stick the pin into the expression wire and the ebon margin to a common good ground. Attach the red lead on the power graphing meter to the pin. Connect the black lead to a known good ground. A known good ground can be the negative battery terminal or any part of the engine that is bare metal and not aluminum.
2. Start the vehicle and open the throttle slowly. The mass air flow voltage should increase smoothly and should have no glitches or drop outs. If there are glitches or drop outs, replace the mass air flow.
3. Allow the vehicle to idle. Snap the throttle open quickly and release it. The signal should rise and drop rapidly. If not, the mass air flow isn't reacting to changes in air flow fast enough. Connect the red lead to the computer ground wire and the black lead to a known good ground.7. Start the vehicle.
Connect the red lead on the power graphing meter to the ignition positive wire, using the pin or needle. Connect the black lead to a known good ground.
5. Turn the key to the "On" position, but don't start the vehicle. You should have battery voltage --- 12 to 13.5 volts.
6. Replace the mass air flow.
Out of Range/No Signal Test
4.Voltage should be less than 0.010 volts. If not, replace the mass air flow sensor.
